\begin{table}[htbp]\centering
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\caption{Switching Vote (Only left), IV - RTI, Germany \label {tab:left}}
\begin{tabular}{l*{4}{c}}
\hline\hline
                &\multicolumn{1}{c}{(1)}&\multicolumn{1}{c}{(2)}&\multicolumn{1}{c}{(3)}&\multicolumn{1}{c}{(4)}\\
                &\multicolumn{1}{c}{+Demographic}&\multicolumn{1}{c}{+Offshoring}&\multicolumn{1}{c}{+Skill}&\multicolumn{1}{c}{All}\\
\hline
Left to Pop Right&                  &                  &                  &                  \\
RTI Index       &    0.210         &    0.902\sym{***}&    0.981\sym{***}&    0.887\sym{***}\\
                &  (0.197)         &  (0.323)         &  (0.317)         &  (0.248)         \\
Female          &   -0.427         &   -0.501         &   -0.301         &   -0.168         \\
                &  (0.949)         &  (0.887)         &  (0.876)         &  (0.837)         \\
Age             &   -0.029         &   -0.037         &   -0.047         &   -0.046         \\
                &  (0.037)         &  (0.033)         &  (0.031)         &  (0.030)         \\
High-Skilled    &   -1.402         &   -1.464         &   -1.470         &   -1.447         \\
                &  (1.030)         &  (1.462)         &  (1.359)         &  (1.265)         \\
Offshorability  &                  &   -2.773\sym{**} &   -3.049\sym{***}&   -3.131\sym{***}\\
                &                  &  (1.201)         &  (0.948)         &  (1.004)         \\
Skill-Specificity&                  &                  &    0.138\sym{**} &    0.129\sym{**} \\
                &                  &                  &  (0.055)         &  (0.058)         \\
Task-Tech       &                  &                  &                  &    0.108         \\
                &                  &                  &                  &  (0.959)         \\
Task-Inter      &                  &                  &                  &   -0.664         \\
                &                  &                  &                  &  (1.195)         \\
Income          &      Yes         &      Yes         &      Yes         &      Yes         \\
Regional controls &       No         &      Yes         &      Yes         &      Yes         \\
\hline
Observations    &     1070         &     1070         &     1070         &     1066         \\
R$^2$           &    0.067         &    0.182         &    0.202         &    0.210         \\
AIC             &  4.5e+05         &  4.0e+05         &  3.9e+05         &  3.8e+05         \\
\hline\hline
\multicolumn{5}{l}{\footnotesize Standard errors in parentheses}\\
\multicolumn{5}{l}{\footnotesize \sym{*} \(p<0.1\), \sym{**} \(p<0.05\), \sym{***} \(p<0.01\)}\\
\end{tabular}
\end{table}
